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How to Install a Transfer Roller in the Samsung SCX-4521 Laser Printer

In the first step of the replacement procedure, you must remove the Scan assembly, the Middle cover, and the Fuser assembly unit by following the instructions given in ‘’How to Install a Fuser Assembly Unit in the Samsung SCX-4521 Laser Printer’’. Then, you must unplug the connectors from the SMPS and LIU PBA. After that, you must remove the six screws from the engine shield, and then release the harness. Now, you must release the engine shield from the Actuator Feed Sensor Lever, and then remove the engine shield from the Samsung SCX-4521 Laser Printer. Once the engine shield is removed, you must remove the four screws from the paper path frame, and take the paper path frame out of the main unit by pulling it towards you. In the next step of the replacement procedure, you must remove the used transfer roller from the paper path frame, and then unpack the new component. After that, you must insert the new transfer roller into the paper path frame, and then finalize the replacement procedure by reinstalling the Scan assembly, the Middle cover, the Engine shield, the Paper path frame, and the Fuser assembly unit.